Tubular marine boiler.



No. 635,003. Patented Oct. I7, i899. H. SIEBERT.

TUBULAR MARINE BDILER.

(Application led Apr. 29, 1899.) (No Mudel 5 Sheets-Sheet l.

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Patented Oct. I7, |899.. H. SIEBEHT.

TUBULAR MARINE BDILER.

(Application led Apr. 29, 1899.)

No. 635,003. Patented oct. I7, |899. H. SIEBERT.

TUBULAH MARINE BOILEB.

(Application led Apr. 29, 1899.)

(Nu Model.)l

5 Sheets-Sheet 3.

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Nn. 635,003. Patented ct. I7, |8919.

H. SIEBEBT.

-TUBULAB MARINE BOILEB.

(,appumion :und Apr. 29, 1899.)

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(No Modal.)

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Patented Oct. I7, 1899.

5 Sheets-.Sheet v5.

H. SIEBERT. TuBuLAn MARINE BolLEn.

(Application mad'Ap. 29, 1899;)

(No Modal.)

linrrnn STATES infront HEINRICH SIEBERT, OF ELBING, GERMANY.

TUBULAR MARINE BOILER.

SPECIFICATIONformng part of Letters Patent No. 635,003, dated October 17, 1899.

Application iiled April 2 9, l. 89 9.

lar Marine Boilers, (for which application for patent has been iiled in Germany on the 15th 0f February,l899,) of which the followingis an exact specication.

This invention relates to new and useful improvements in tubular marine boilers; and it consistsof a certain arrangement of parts, as fully describedvand hereinafter set forth.

My invention has for its object to providea new and improved tubular marine boiler of that kind where the chief or principal heating-surface is composed of a plurality of water-tubes inclined downward from front to rear of the boiler, the lower ends ofthe tubes communicating with a water-cylinder and the upper ends communicating with a steam-cyl inder, both cylinders being connected by one or more inclined circulating stand-pipes The particular arrangement of parts in a boiler according to my invention has the object, rst, to attain a strong circulation of water; second, to deliver the steam in a dry state; third, to add to the safety and durability of the boiler, and, fourth, to allow an easy cleansing of the apparatus.

The construction by means of which this purpose is attained is the following: The water-tubes of a boiler according to my invention incline strongly (about twenty-five degrees) to the rear, whereby the steam produced within the tubes reaches the steamcylinder in quite a dry state. The construe* tion of such inclined tubes offers difficulties, insomuch as the headers could not be constructed the one overlapping the other, owing to the insufcient space. It is a special feature of my invention that these headers of the Water-tubes can be suitably arranged without overlapping another. For this purpose the headers containing the water-tubes are constructed in step form. In order to arrange a great number of tubes of small diameter within the step-formed headers, each of them carries three or four, (but only a small number of tubes,) so that each header contains a group of Water-tubes which sei-in No. 715,032. or@ man.)

are separated by comparatively a greater space from the following group'of water-tubes. Thereby is attained a great heating-surface, which is formed by only"a very smallnumber of water-tubes. The formation of smoke and the deposits of ashes on the upper sides of the tubes are prevented, for the reason that the greatintermediate spaces between the different groups of water-tubes allow that the gases separated by the different tubes unite again, thereby an efficient passing of the iiame around all of the water-tubes being attained.

Thev different parts of this boiler are ar ranged so that one wall formed by the series of headers is fixed to the steam-chamber7 while the other wall reposes upon the watercylinder, thereby a distorting of the boiler being prevented. Instead of two series of headers two water-legs advantageously can be employed, the outer wall of which is even, While the inner wall directed to the fire-grate has the before-described step form.

In order to make my invention more clear, I refer to the accompanying` drawings, in Whichy f Figure l. shows a vertical section through the boiler. Fig. 2 illustrates atransverse section through the boiler. Fig. 3 is a horizontal section showing a general view of the draft-regulation device. Fig. et is a detail View of the same. Fig. 5- shows the regulation device beingactuated. Figs. G and 7 show a modified form of construction according to Figs. il: and 5. Fig. 8 is a vertical section through a series of headers consisting of several pieces connected together. Fig. 9 is a transverse section according to Fig. 8.

In the drawings, a is a steam-chamber, and b is the water-cylinder, of the boiler. Both the steam-chamber and the water-cylinder are connected by one or more stand-pipes c, arranged laterally to the boiler, or in long boilers in the middle of the same.

d are the front headers for taking up the water-tubes.

c are the rear headers.

f are the water-tubes introduced in the front and in the rear headers.

g is a fire-grate arranged in the direction of the water-tubes. The fore and rear head pieces are composed -in horizontal direction IOO plugs and in vertical direction. 'formed by one single piece or composed of of series connected together by means of They are several pieces connected together by suitable means, Figs. S and 9. Each header is provided with lateral ribs h, in which ribs are bored recesses t, so that, first, a smoke-tight wall is formed by the headers, and, second,the cleaning of the water-tubes can easily be effected from the outside.

As illustrated in the drawings, the boiler is inclosed by a double mantle lo Z k Z', thus forming the channels m, through which the heated air is conducted to the openings n, arranged underneath the fire-grate. Thereby the radiation of the wall 7c is utilized within the boilerand is prevented from acting to the outside. It is easily to be seen from the drawings that owing to theinclination of the water-tubes f an energetic circulation is attainedf The steam produced within these tubes f, owing to their strong inclination, tends to escape as quickly as possible. Therefore the circulation not only will be a very lively one, but also a good utilization of the fire, and a formation of very dry steam will be effected.

The header for each group of water-tubes is rendered tight by a closing mechanism arranged at its outside. This mechanism is a very simple one and clearly representedin Figs. 8 and 9. It consists'of a disk o, having a projecting annular border p, 'which latter engages in an angular groove q, arranged at the outside of the header. The tightening of the joint is effected by means of a clamp r, i

provided at the inside of the header, and a screw-bolt s, arranged on the outside of the disk o in any suitable manner. The heating of the boiler, as described heretofore, is effected in the ordinary mannerthat is to say, the fire-gases flow from the bottom of the boiler to the top of the same.

Afurther advantage of great importance is attained by means of my draft-regulating device, Which enables a uniform heating of all of the'water-tubes. Hitherto the tire-gases were throttled or ejected; but in my invention I mislead the fire-gases from their natural nearest way to the chimney-that is to say, the fire-gases, which, owing to their position, could take the nearest way to the chimney, are throttled on this wa'y and are obliged to pass a longer way, so as to cause them to pass freely over the whole heating-surface-that is to say, over the whole length and breadth of the boiler. They pass freely and uniformly around each tube in all its length, whereby the boiler may have any dimension with respect to the position of the chimney, so that the whole length of the boiler can be employed forarrangingiire-grates. In this mannergreat fire-grates can be employed with economical combustion; also boilers of extraordinary dimensions having great heating-surfaces can be built, as in spite of the compactness of the boiler a good distribution of the lire-gases vis possible.

Evidently the draft mechanism can be constructed in such manner as to be regulable.

This is effected in the simplest way when it acts as throttling mechanism, stopping the tire-gases at the one side more than at the other. Such a device is illustrated in the accompanying drawings in Figs. 3 to 7.

Fig. 3 shows a top View of a tubular marine boilerconstructedaccording to my invention. a is a steam-chamber, b the water-cylinder, and g (right-hand side) illustrates the position of the fire-grate. f on the left-hand side of Fig. 3 shows the position of the watertubes lying 'parallel to the iire-grate g. s is a common chimney. The apertures t* for the fire-gases preferably are of trapeze form, the smaller parts lying near the chimney. The regulating mechanism is formed by a plate 4r, rigidly connected to the boiler. Upon this plate reposes a second plate y, displaceable by means of screws s s. Apertures of the form illustrated in the drawings are provided on the plate The plate y, reposing upon the plate cc, has apertures fu', which in form are similarl to the apertures fz; of the plate The position of the plate y can be varied at will by screwing or unscrewing either by both the screws s and s or one of them. For instance, in Fig. 5 the screw S is screwed in and the plate y is moved aside, so that the apertures c' take the position represented in Fig. 5. It is quite evident that the position of this plate 'y with respect to the lower plate fr: can be regulated at will.

Fig. 6 shows a modified form of construction in which the apertures are not of trapeze form, as represented in Figs. 8 to 5, but of rectangular form. This modification is only of constructional nature and does not aect the idea of my invention.

In constructing a boilerin the mannerhere= inbefore described there 'are some great advantages. First, owing to the inclination of the tubes two free spaces are formed, which are of great importance for a good action of the boiler-viz., a free space is formed over the fire-grate g. Thereby a good formation of the flame is ascertained and a complete combustion is effected. The second space is formed between the Water-tubes and the draftregulating mechanism. This space can be employed for taking up a device for effecting the initial heating of the water or a superheater. Evidently both arrangements, the mechanism for effecting the initial heating as well as a superheater, can be arranged within the space between the draft-regulatn g mechanism and the water-tubes.

Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the United States isl. In tubular marine boilers, the combination of a steam-chamber and a Water-cylinder, with an inclined circulating stand-pipe IOO IIO

connecting the steam-chamber to the watercylinder, headers taking up a group of Water- Y tubes and arranged in step form at the front and rear of the boiler, forming vertically one single piece or several pieces connected together and being connected horizontally, one or more stand-pipes connecting the steamchamber with the Water-cylinder,a draft-regulating mechanism provided at the top end of the boiler, substantially and for the purpose as described.

2. In tubular marine boilers, the combination of a steam-chamber a and a water-cylinder b connected with one or more stand-pipes c connecting the two receptacles, headers d arranged in step form and provided with ribs 7L having openings c' allowing an easy cleansing of the water-tubes, plates o having angular borders p engaging into grooves q provided in the headers, screw-boltssand clamps r. tightening the plates and consequently the headers, for the purpose and substantially as described.

the boiler, front and rear headers d c arranged in step form, mantles la Z 7c Z surrounding the boiler, and forming a channel m conducting the air underneath the re -grate through openings n, a plate xed to the top end of the boiler7 provided with openings o in tra peze or other suitable form, a platev y reposing upon said plate 00, openings 'u' in form similar to o, provided in said plate y, screws s s' for altering the position of the plate y thus regulating the draft, for the purpose and substantially as described.

In witness whereof I have hereunto set my hand in presence of -two witnesses.

HEINRICH SIEBERT.

Witnesses:

BERNHARD DUER, WILHELM AMMOR. 

